Five Triangles mathematics blog
This blog, which dates back to April, 2012, posts problems for middle and junior high school students. Topics have ranged from ratios and fractions to area and paths to quadratic equations and linear equations.
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Flash Games - ATK Solutions, Inc.
Flash applets and games include rotating 3d cube; mind boggle square, which challenges you to slide a square across a surface by sliding other quadrilaterals into the unoccupied spaces; Futoshiki, which involves positioning counting numbers on a grid
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Free Doughnuts - Web Feats Workshop II
You have a piece of cardboard 24 by 15 inches. Your problem is to figure out how much to cut out of each corner to make the box with the biggest (maximum) volume. Use the applet to explore how changing the size of the cutout changes the box. This workshop
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Free Puzzles - Jimmie Dean
A collection of puzzles and brainteasers, divided into geometry, logic, math, weight, moves, and miscellaneous. Each puzzle includes a hint, and solutions are available through e-mail. Online games and puzzles include a chess knight game and Hangman.
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From Counting to Writing - Ivars Peterson (MathLand)
Abstract numbers are the product of a long cultural evolution. They also apparently played a crucial role in the development of writing in the Middle East. Indeed, numbers came before letters, contends archaeologist Denise Schmandt-Besserat of the University
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Gadgets - Jan Gombert
Gombert's five "gadgets" provide simple challenges that combine addition, multiplication, and two- or three-dimensional geometry. Balancing Act shows three values on a beam to balance by addition. Make a given perimeter or area by resizing the figure
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Geometria - Stelian Dumitrascu
A Java program in interactive solid geometry. Solids can be revolved, cut,
joined, built from scratch, measured, and drawn upon. View demo applet online or download a shareware version of the program. (Geometria can be run as a stand-alone application
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George W. Hart: Index - George W. Hart
An index to some of the areas covered by Hart's Web pages: Geometric sculpture; Encyclopedia of Polyhedra - over 1000 virtual polyhedra; Pavilion of Polyhedreality - images and geometry links; Hart's upcoming book about Zome Geometry; research and publications;
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The Great Golden Pyramid - Tony Smith
The largest of the Giza pyramids is usually called the Great Pyramid. It can also be called the Great Golden Pyramid, because its geometry is that of the Golden Mean. Pictures and diagrams of the interior and exterior architecture, with explanations of
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Greg Egan's Home Page
Information, illustrations, and Java applets that supplement some of the works of the science fiction author. The Applets Gallery includes groups of rotations in three dimensions and in four dimensions; Escher, inspired by the artist's conflicting orientation
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ICSE Maths - Suresh Lala
The site contains practice problems for the ICSE (Indian Certificate of Secondary Education) Exam. General topics include arithmetic, algebra, geometry and statistics. Each sub-topic typically includes about twenty problems, with answers at the bottom
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Imaging the Imagined - Paul Flavin
Modeling with Math and a Keyboard: the art and science of modeling; the math, theory and practice of rendering, imaging, and animation. An introduction to raytracing and the Quadric surfaces; Platonic Solids and Polyhedra; 'Tensegrity' (tension) structures;
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Integer Jim's Math Squad - Jim Bennett
Creative ways to use art, writing, research, and Internet projects to make math more exciting for students. The Math Squad art projects are year-long projects; rather than "lesson oriented," they create an "adventure theme" that facilitates math instruction.
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Japanese Temari - Barb Seuss
Read about the history of this Asian needlework craft, find free patterns to stitch your own geometric designs on the sphere, browse online galleries of temari, and more.
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KaleidoTile - The Geometry Center
A downloadable program for the Macintosh based on the Geometry Center's tiling program on display at the St. Paul Science Museum. You can use KaleidoTile to create and manipulate tessellations of the sphere, Euclidean plane and hyperbolic plane, and to
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Knowhere - Rick Engel; Polymorf, Inc.
Lesson on how the structure of space determines the
shape of things in geometry and chemistry. The
principles of solid geometry are related to their real life
embodiment in the crystal structures of elements and
minerals using Polymorf, a new math/science
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Learn Math 3D on Orbital One - Peter Richards
A software math course set within a real time 3D environment. Topics covered include counting, the number system, addition, subtraction, multiplication, division, 2D and 3D shapes, simple fractions, and telling the time.
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The Logic Puzzle Museum
Play with more than fifty different hands-on brain twisters, mechanical and logic puzzles -- and craft your own. Regular events at this Burlington, Wisconsin, museum include Valentine's Day (make-your-own historic rebus valentines), celebrations of the
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Mag's 3x3 Rubik's Cube Solution - Tom Magliery
A small collection of operations for the 3x3 Rubik's Cube, which assumes that you already know how to get one entire face solved; this means not only having all of one color on one side, but also having those 8 pieces in the proper position with respect
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Match Sticks in the Summer - Ivars Peterson (MathLand)
One of the presenters at the Strens conference was mathematician Heiko Harborth of the Braunschweig Technical University in Germany. "Match sticks are [among] the cheapest and simplest objects for puzzles which can be both challenging and mathematical,"
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MathApplications - Cathleen V. Sanders
An interactive mathematics course offered via the Internet to students throughout the Hawaiian islands. Cathi Sanders, a teacher at Punahou School in Honolulu, teaches this course through ESchool, a pilot project of the Hawaii Department of Education
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Math Dance - Karl Schaffer and Erik Stern
The Dr. Schaffer & Mr. Stern Dance Ensemble has performed and conducted workshops on math dance in hundreds of schools and conferences since 1987. From that work, Co-Artistic Directors Karl Schaffer and Erik Stern wrote MathDance, a 132-page book with
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